I think the "how appropriative is Madame X and how much does it matter?" is still an interesting question. The "I'm just bringing all this music into the spotlight" angle that she pushed feels true and disingenuous at the same time. There's no doubt it's all very tastefully done, but Madonna's persona just exerts so much pressure on everything she does. She does step back on occasion (we see this in Dark Ballet, Ciao Bella, Batuka to a certain extent), but she's still very much centralized and sometimes uncomfortably so.
Far from turning me off of the album, this constant tension between appropriation and respect actually makes it that much more interesting.